Imaginary Insanity

Cycnus has been locked up in a mental hospital for the past ten years because of his 'imaginary friend' named Herschel. Who is this Herschel character? Is he the only reason why Cycnus is in such a place? And if Hershel is nothing but a figment of Cycnus' mind than why can he move objects? Herschel X Cycnus, Yaoi, AU